The Air Vehicle from Rokr is a great wooden kit. Through many gears, the spring as a motor drives the model and makes the wheels and propeller turn, among other things.
You don't know where you belong: on land, in the water or in the air?
Then the hovercraft is just the thing for you. The large wheels traverse all irregularities in the terrain. In the water you always float on top, due to the stable hull. The wheels can be used as paddles. Over ravines you fly there into the evening sun with the air cushion.
Build your own 170-piece hovercraft as a wooden kit.